Festo LFR-1/2-D-MIDI-KD Service Unit Combinations

Technical Overview

The Festo LFR-1/2-D-MIDI-KD (part number 185751) is a comprehensive air preparation service unit combination designed for robust industrial pneumatic systems. It features a high-performance filter regulator with a 40 µm filtration grade, ensuring compressed air purity that meets ISO 8573-1:2010 standards. This Midi-size, D-series unit includes an integrated on/off valve powered by a 24V DC solenoid coil, a precision pressure gauge, and a manually rotating condensate drain. Housed in a durable zinc die-cast body with a polycarbonate bowl and metal bowl guard, it operates efficiently within a 0.5 to 12 bar pressure regulation range and handles a standard nominal flow rate of 2,000 l/min, making it an essential component for reliable pneumatic control and automation equipment protection.

Key Features

40 µm filtration grade ensuring ISO 8573-1:2010 [7:8:4] compliant air purity
Broad pressure regulation range from 0.5 bar to 12 bar
Standard nominal flow rate of 2,000 l/min for high-efficiency pneumatic systems
Durable zinc die-cast housing with polycarbonate bowl and metal bowl guard
Integrated 24 V DC electrically actuated on/off valve for automated PLC control
Manual condensate drain with rotary knob actuator lock for easy maintenance

Technical Specification Matrix

Parameter	Value
Series	D
Size	Midi
Filtration Grade	40 µm
Pressure Regulation Range	0.5 to 12 bar
Standard Nominal Flow Rate	2,000 l/min
Pneumatic Connection	G1/2
Condensate Drain	Manual rotary
Housing Material	Die-cast zinc
Bowl Material	Polycarbonate (PC) with metal guard
Operating Voltage	24 V DC (Solenoid)
Medium/Ambient Temperature	-10 °C to 60 °C

Industrial Applications

1. High-Speed Automated Packaging Machinery

In automated packaging lines, inconsistent air pressure and moisture can cause pneumatic cylinders to jam or misfire. This service unit guarantees clean air using its 40 µm filtration and precise pressure regulation.

Problem Solved

Prevents erratic cylinder actuation and machine downtime by delivering clean, stable air up to 2,000 l/min, combined with a 24V DC solenoid valve for automated line shut-offs during faults.

40 µm filtration0.5 to 12 bar2,000 l/min24V DC solenoid

2. CNC Machine Tool Pneumatic Supply

Machining centers rely on compressed air for automatic tool changers and spindle clearing operations. Particulate contamination and moisture can severely damage these sensitive mechanical components over time.

Problem Solved

Solves premature wear of pneumatic components by removing rust and condensation via the manual drain and PC bowl, while maintaining steady system pressure despite flow fluctuations.

Manual condensate drainPolycarbonate bowlDie-cast zinc housingISO 8573-1:2010

3. Industrial Assembly Line Robotics

Robotic end-effectors and grippers require an immediate, precisely regulated air supply coordinated with master PLC commands to ensure safe and synchronized assembly operation.

Problem Solved

Integrating an electrically actuated 24 V DC on/off valve with a reliable filter regulator allows PLC-driven automated air shut-off directly at the robotic cell, improving safety and cycle efficiency.

24 V DC on/off valveRotary knob with detentPLC controlG1/2 connection